help with picking a new food

ok, so i've been through a lot of cat foods over the past few years....when i first got akasha 6 yrs ago i put her on proplan kitten per the vet and kept her on it till she was a little over a year old, switching to adult of course, she started to put on a lot of weight. i moved her to science diet per another vet. then i started doing my own research on cat food versus needs. i then got kahlan. i put them both on a combo of evo and chicken soup. they did well on this for a couple years till evo changed their formula and they stopped eating it. i then got joey. he couldn't eat the chicken soup. he was on purina indoor (i know i know). a little while back chicken soup changed their formula and akasha started to refuse it and kahlan started throwing it up. i switched to TOTW, and all the cats are happily eating it. but the litter box is awful. so given the wide variety of foods i've tried and whats still out there, are there any suggestions for a fairly reasonably priced food for my babies?

Akasha is 7.
Kahlan is 5.
Joey is 14ish.

side note, Akasha has a sensitive tummy.

What is awful about the potty box?

I would be looking at simple , senior formulas or a all stage with 32% or less protein.. You have one middle age , one semi senior and one mature

Do you have a costco? the kirkland is a 30% protein all stage with solid ingrediants for a very good price

the litter box reaks, i have two boxes in a two bedroom apt. and i clean twice a day. its just bad.

no, i don't have a cosco. i have petsmart, petco, and two small local shops. i have no problem ordering online though.

i was very disappointed when chicken soup changed their formula, my girls did so well on it.

you may try solid gold in the purple bag